(57) A permanent magnet prime mover has a plurality of rotor permanent magnets (2) which
are mounted on the periphery of a rotor (1) at a constant center angle, and a plurality
of casing permanent magnets (4) which are arranged on the interior periphery of a
casing (3) housing the rotor (1) at a constant center angle to face to one another
with the same polarity. By moving the casing magnets (4) close to the rotor magnets
(2) in the radial direction in order, a rotation force is given to the rotor (1) to
rotate the rotor (1) continuously by utilizing repulsive force of the magnets (2,
4) which is strong in proportion to the inverse square of the distance of the gap
between the opposing magnets (2, 4).
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